Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of optical communication in a passive optical network, comprising: operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on; operating the ONU in a second state in which both the transmitter and the receiver are turned off; transitioning the ONU directly from the first state to the second state and transitioning the ONU directly from the second state to the first state, based on a power management rule; ensuring the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state; and receiving, by the receiver, a power management message from an optical line terminal (OLT); and changing the power management rule based on the received power management message.
A method for saving power in a passive optical network (PON) by controlling an optical network unit (ONU) involves switching between two low-power states. In the first state, the ONU's transmitter is off, but its receiver is on, allowing it to still receive data. In the second state, both the transmitter and receiver are off. The ONU transitions directly between these states based on a power management rule. Before exiting either state, the ONU ensures it is fully powered up, synchronized, and ready to handle network traffic. The ONU receives power management messages from an optical line terminal (OLT) and adjusts its power management rules accordingly.
2. The method of claim 1 , further comprising: operating the ONU in a third state in which both the transmitter and the receiver are turned on.
The power saving method for a passive optical network (PON), as previously described, further includes a third state for the optical network unit (ONU). In this third state, both the ONU's transmitter and receiver are turned on, allowing for normal bidirectional communication. Therefore, the ONU can exist in a state where the receiver is on and the transmitter is off, a state where both are off, and a state where both are on.
3. The method of claim 1 , wherein the power management rule specifies a first time period for operation in the first state and a second time period for operation in the second state and wherein the transitioning is performed upon expiration of at least one of the first time period and the second time period.
The power saving method for a passive optical network (PON), as described earlier, uses a power management rule that specifies time limits for the two low-power states. The optical network unit (ONU) operates in the first state (transmitter off, receiver on) for a set duration, and then in the second state (both off) for another set duration. The transition between these states happens automatically when either of these time periods expires.
4. The method of claim 1 , further comprising: transmitting, to an optical line terminal, a message indicative of the transitioning between the first state and the second state.
The power saving method for a passive optical network (PON), as described earlier, involves the optical network unit (ONU) sending a message to the optical line terminal (OLT) whenever it switches between the two low-power states. This notification informs the OLT about the ONU's current power state which allows the OLT to manage the network efficiently.
5. The method of claim 1 , further comprising: performing the transitioning responsive to the received power management message and a local decision to change an operational state.
The power saving method for a passive optical network (PON), as described earlier, enables the optical network unit (ONU) to transition between the two low-power states (transmitter off/receiver on, and both off) based on two inputs: a power management message received from the optical line terminal (OLT), and a local decision made by the ONU itself. This allows the ONU to adjust its power state dynamically based on network conditions and its own operational needs.
6. An optical communication apparatus in a passive optical network, comprising: means for operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on; means for operating the ONU in a second state in which both the transmitter and the receiver are turned off; means for transitioning the ONU directly from the first state to the second state and means for transitioning the ONU directly from the second state to the first state, based on a power management rule; means for ensuring the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state; and means for receiving, by the receiver, a power management message from an optical line terminal; and means for changing the power management rule based on the received power management message.
An optical communication apparatus in a passive optical network (PON) achieves power savings by controlling an optical network unit (ONU). The apparatus includes components to operate the ONU in a first state where the transmitter is off and the receiver is on, and in a second state where both are off. It transitions the ONU directly between these states based on a power management rule, ensuring the ONU is ready for network traffic before exiting either state. The apparatus also receives power management messages from an optical line terminal (OLT) and uses them to change the power management rule.
7. The apparatus of claim 6 , further comprising: means for operating the ONU in a third state in which both the transmitter and the receiver are turned on.
The optical communication apparatus, as previously described, also includes components for operating the optical network unit (ONU) in a third state, where both the transmitter and the receiver are turned on. Therefore, the apparatus can control the ONU to exist in a state where the receiver is on and the transmitter is off, a state where both are off, and a state where both are on.
8. The apparatus of claim 6 , wherein the power management rule includes a first time period for operation in the first state and a second time period for operation in the second state and wherein the means for transitioning performs a state transition upon expiration of at least one of the first time period and the second time period.
The optical communication apparatus, as described earlier, implements a power management rule that uses time periods. The optical network unit (ONU) operates in the first state (transmitter off, receiver on) for a specified duration, and in the second state (both off) for another duration. The apparatus transitions the ONU between these states automatically when either of these time periods expires.
9. The apparatus of claim 6 , further comprising: means for receiving a power management message from an optical line terminal; and means for performing the transitioning responsive to the received power management message and a local decision to change an operational state.
The optical communication apparatus, as described earlier, receives a power management message from an optical line terminal (OLT). The apparatus transitions the optical network unit (ONU) between the two low-power states (transmitter off/receiver on, and both off) based on the received message and a local decision made by the ONU.
10. An optical communication apparatus, comprising: a memory that stores processor-executable instructions; and a processor that uses the stored instructions to implement a method, comprising operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on; and operating the ONU in a second state in which both the transmitter and the receiver are turned off; and wherein the processor includes means for transitioning the ONU directly from the first state to the second state and means for transitioning the ONU directly from the second state to the first state, based on a power management rule; wherein the processor uses stored instructions to ensure the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state; and wherein the processor further uses the stored instructions to implement the method by receiving, by the receiver, a power management message from an optical line terminal (OLT) and changing the power management rule based on the received power management message.
An optical communication apparatus uses a processor and memory to control an optical network unit (ONU) for power saving. The processor operates the ONU in two states: first, transmitter off and receiver on; second, both transmitter and receiver off. The processor directly transitions the ONU between these states based on a power management rule. It ensures the ONU is fully operational before exiting either state. The processor receives power management messages from an optical line terminal (OLT) and updates the power management rule accordingly.
11. The apparatus as in claim 10 , wherein the power management rule specifies a first time period for operation in the first state and a second time period for operation in the second state and wherein the transitioning is performed upon expiration of at least one of the first time period and the second time period.
In the optical communication apparatus as described earlier, the power management rule dictates time limits for the ONU's low-power states. The ONU operates in the first state (transmitter off, receiver on) for a defined period, and then in the second state (both off) for another period. The processor transitions the ONU between these states when either time period expires.
12. An optical line terminal (OLT) for operation in a passive optical network (PON), the optical line terminal comprising: a processor configured to generate messages for controlling a transition of an optical network unit from a first low power state in which a receiver of the optical network unit is turned on but a transmitter of the optical network unit is turned off to a second low power state in which both the receiver and the transmitter of the optical network unit are turned off; a transmitter configured to transmit the generated messages to the optical network unit; wherein the generated messages comprises a periodic consent message to allow the optical network unit to remain in either the first low power state or the second low power state.
An optical line terminal (OLT) in a passive optical network (PON) manages optical network unit (ONU) power consumption by sending control messages. These messages control transitions between two low power states: one where the ONU's receiver is on but its transmitter is off, and another where both receiver and transmitter are off. The OLT periodically sends a consent message to allow the ONU to remain in either of these low power states.
13. The optical line terminal as in claim 12 , wherein the processor includes means for specifying a first time period for operation in the first low power state and a second time period for operation in the second low power state and wherein the transition of the optical network unit from the first low power state to the second low power state is controlled to occur upon expiration of at least one of the first time period and the second time period.
The optical line terminal (OLT), as described earlier, specifies time limits for the two low-power states of the optical network unit (ONU). The OLT defines a first time period for the ONU to operate with its receiver on and transmitter off, and a second time period with both receiver and transmitter off. The transition from the first low power state to the second low power state happens upon expiration of either time period.
14. A passive optical network (PON) communications system, comprising: an optical network unit (ONU) operable in a first low power mode in which the ONU is able to receive but not transmit and a second low power mode in which the ONU is not able to either receive or transmit, wherein the ONU is configured to transition from the first low power mode to the second low power mode and to transition from the second low power mode to the first low power mode based on a power management rule, and wherein the ONU changes a power management rule based on a received power management message; an optical line terminal (OLT) communicably coupled to the ONU, the OLT configured to transmit a control message to the ONU to control at least one aspect of transition of the ONU between the first low power mode and the second low power mode; and the ONU configured to ensure that the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first low power mode or the second low power mode.
A passive optical network (PON) communications system includes an optical network unit (ONU) and an optical line terminal (OLT). The ONU operates in two low-power modes: one where it can receive but not transmit, and another where it cannot receive or transmit. The ONU switches between these modes according to a power management rule and can change this rule based on messages received from the OLT. The OLT sends control messages to manage the ONU's transitions between the modes. The ONU ensures it is ready for network traffic before exiting either low power mode.
15. The system as in claim 14 , wherein: the OLT is configured to transmit the control message that includes the power management rule that specifies a first time period for operation in the first low power state and a second time period for operation in the second low power state and to control the ONU to transition from the first low power state to the second low power state upon expiration of at least one of the first time period and the second time period.
In the passive optical network (PON) system, as described earlier, the optical line terminal (OLT) sends a control message containing a power management rule to the optical network unit (ONU). This rule specifies time limits for the ONU's low-power states: a first time period for the receive-only state and a second time period for the completely-off state. The OLT controls the ONU to switch from the receive-only state to the completely-off state when either time period expires.
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October 31, 2017
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